17 March 2015 Compact multi-projection 3D display using a wedge prism
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Abstract
We propose a compact multi-projection system based on integral floating method with waveguide projection. Waveguide projection can reduce the projection distance by multiple folding of optical path inside the waveguide. The proposed system is composed of a wedge prism, which is used as a waveguide, multiple projection-units, and an anisotropic screen made of floating lens combined with a vertical diffuser. As the projected image propagates through the wedge prism, it is reflected at the surfaces of prism by total internal reflections, and the final view image is created by the floating lens at the viewpoints. The position of view point is decided by the lens equation, and the interval of view point is calculated by the magnification of collimating lens and interval of projection-units. We believe that the proposed method can be useful for implementing a large-scale autostereoscopic 3D system with high quality of 3D images using projection optics. In addition, the reduced volume of the system will alleviate the restriction of installment condition, and will widen the applications of a multi-projection 3D display.
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Soon-gi Park, Chang-Kun Lee, Byoungho Lee, "Compact multi-projection 3D display using a wedge prism", Proc. SPIE 9391, Stereoscopic Displays and Applications XXVI, 939113 (17 March 2015); doi: 10.1117/12.2083357; https://doi.org/10.1117/12.2083357
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